Botany. pollination of the ovules of a flower by its own pollen; self-fertilization (opposed to ). Biology. conjugation in an individual organism by division of its nucleus into two parts that in turn reunite to form a zygote. Historical Examples Meiosis in Rhynchonympha in one cytoplasmic and two nuclear divisions followed by autogamy. The Biotic […]

an aircraft with an unpowered, horizontally rotating propeller on a shaft above the fuselage that provides lift for the machine, with forward propulsion being provided by a conventional propeller: superseded in most applications by the helicopter. Historical Examples Climbing out of the autogiro they walked towards the center of the island where the sand was […]

a tissue or organ that is into a new position on the body of the individual from which it was removed. noun (surgery) a tissue graft obtained from one part of a patient’s body for use on another part autograft au·to·graft (ô’tō-grāft’) n. A tissue or an organ grafted into a new position in or […]

a person’s own signature: He collects autographs of artists. something written in a person’s own hand, as a manuscript or letter. written by a person’s own hand: an autograph letter. containing autographs: an autograph album. to write one’s name on or in; sign: to autograph a book. to write with one’s own hand. Contemporary Examples […]

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